CMake/Source/cmGetTargetPropertyCommand.cxx

/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmGetTargetPropertyCommand.h"

// cmSetTargetPropertyCommand
bool cmGetTargetPropertyCommand::InitialPass(
  std::vector<std::string> const& args, cmExecutionStatus&)
{
  if (args.size() != 3) {
    this->SetError("called with incorrect number of arguments");
    return false;
  }
  std::string var = args[0];
  const std::string& targetName = args[1];
  std::string prop;
  bool prop_exists = false;

  if (cmTarget* tgt = this->Makefile->FindTargetToUse(targetName)) {
    if (args[2] == "ALIASED_TARGET") {
      if (this->Makefile->IsAlias(targetName)) {
        prop = tgt->GetName();
        prop_exists = true;
      }
    } else if (!args[2].empty()) {
      const char* prop_cstr = tgt->GetProperty(args[2], this->Makefile);
      if (prop_cstr) {
        prop = prop_cstr;
        prop_exists = true;
      }
    }
  } else {
    bool issueMessage = false;
    std::ostringstream e;
    cmake::MessageType messageType = cmake::AUTHOR_WARNING;
    switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0045)) {
      case cmPolicies::WARN:
        issueMessage = true;
        e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0045) << "\n";
      case cmPolicies::OLD:
        break;
      case cmPolicies::REQUIRED_IF_USED:
      case cmPolicies::REQUIRED_ALWAYS:
      case cmPolicies::NEW:
        issueMessage = true;
        messageType = cmake::FATAL_ERROR;
    }
    if (issueMessage) {
      e << "get_target_property() called with non-existent target \""
        << targetName << "\".";
      this->Makefile->IssueMessage(messageType, e.str());
      if (messageType == cmake::FATAL_ERROR) {
        return false;
      }
    }
  }
  if (prop_exists) {
    this->Makefile->AddDefinition(var, prop.c_str());
    return true;
  }
  this->Makefile->AddDefinition(var, (var + "-NOTFOUND").c_str());
  return true;
}